Hope your TW has made it to warm cover by now.
While you're cleaning and scraping crud, periodically squirt penetrant on your window clamp bar screws. Wiggle them loose over time. You really don't want to snap off a screw when you eventually take them apart. There's a lot of misunderstanding about this series of Corning windows, but with patience and skill, they're very rebuildable.
While in dis-assembly mode, you will undoubtedly question the fabrication quality. It is a common complaint. I eventually resigned to the fact that it must be very hard to find craftsmen in a little town like JC, there must have been attitude issues with the troubled company being sold to Beatrice Foods, 300 boys a day were dying in Vietnam. So be amazed that it turned out as good as it did.
All the interior construction debris was swept/hidden under my bath tub. In 2011 I toured the factory, and someone in the group complained to Ol' Don about all the hidden trash in his newer AS. Ol' Don says “We bought some shop vacs last year, now we're trying to get the workers to use them.”
The good news is that it's in your hands now.
Keep us posted with photos.